Kepler-373 and Its Two Planets

Kepler-373 is a star located 3560 light-years away. It hosts two planets, both discovered by transit in 2014. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods. The star's reported mass estimate is smaller than the Sun's, and its reported temperature of 5600 K is cooler than the Sun's. It is 0.93 solar masses, 0.9 solar radii, and 4.17 billion years old.

Kepler-373 b and Kepler-373 c are both Earth-like planets, a size class that stays within 1.5 times Earth's radius. Kepler-373 b has an orbital period of 5.54 days and a radius of 1.36 Earth radii. Kepler-373 c orbits every 16.7 days at 1.24 Earth radii. Among the listed planets, Kepler-373 b has the shortest year by reported estimates, while Kepler-373 c has the longest. Kepler-373 b also has the largest radius by reported estimates, and Kepler-373 c the smallest.